Adds Save graphic, Change Picture, Edit with external tool, Crop (by
handles) to scalc. Proposal of new Format menu and image context menu
organisation.


This is part of a serie of 4 patches that adds Save graphic, Change Picture,
Edit with external tool, Crop (by handles) in all products (scalc,
sdraw, simpress, swriter).
Main menus, toolbars and contextual menus are updated accordingly.

Change-Id: I7f5cf2d1eb3870245684eadf5909fe590d56bf42
Reviewed-on: https://gerrit.libreoffice.org/15589Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Jan Holesovsky <kendy@collabora.com>